제어로봇시스템학회:학술대회논문집
- 2001.10a
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- Pages.33.2-33
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- 2001
Stabilization of Nonlinear Discrete-Time Systems in a Frequency Domain
- Okuyama, Yoshifumi (Tottori Univ.) ;
- Nakamori, Kenji (Tottori Univ.) ;
- Takemori, Fumiaki (Tottori Univ.)
- Published : 2001.10.01
Abstract
The robust stability condition for sampled-data control systems with a sector nonlinearity was presented in our previous paper. Although it is applicable only to the sampled-data control system of a certain class, a usual discretetime control system can belongs to this type of class. This paper analyzes the amplitude dependent behavior of nonlinear sampled-data (i.e., discrete-time) control systems in a frequency domain. By considering restricted areas (sectors) in the nonlinear characterisitic, the existence of a sustained oscillation is estimated, and the relationship between the stable/unstable conditions and the result derived from describing function is compared. Based on these considerations, the stabilization of nonlinear discrete-time control systems is examined in the frequency domain.
Keywords